Effect of an Oothecal Parasitoid, Comperia merceti (Compere) (Hymenoptera: Encyrtidae), on a Population of the Brownbanded Cockroach (Orthoptera: Blattellidae)

Autor:	R. G. Van Driesche, R. R. Coler, J. S. Elkinton
Rok vydání:	1984
Předmět:	education.field_of_study Cockroach Ecology biology Orthoptera Population Parasitism Zoology Hymenoptera biology.organism_classification respiratory tract diseases Parasitoid Encyrtidae Insect Science biology.animal Nymph education Ecology Evolution Behavior and Systematics
Zdroj:	Environmental Entomology. 13:603-606
ISSN:	1938-2936 0046-225X
Popis:	The density and age structure of a free-living Supella longipalpa (F.) population were monitored with baited jar traps over a 3-year period in a fly-rearing room. The impact of Comperia merceti (Compere) parasitism on this population was assessed by means of trap hosts. These were cockroach oothecae from a laboratory colony which were placed in the fly-rearing room weekly. After an artificially stimulated rise in cockroach density, percent parasitism in trap hosts increased sharply from trace levels (< 1%) to 70 to 90%. Ninety to 120 days after this rise in parasitism, cockroach captures decreased sharply. This decrease began with the smallest nymphal class, followed by medium and large nymphs, and ultimately adults. This pattern of increased parasitism followed by a sharp decline in cockroach density and a progressive change in the population age structure supports the conclusion that C. merceti caused the collapse of the cockroach population.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56428f15e46ea36880bbcd8ab784f29c https://doi.org/10.1093/ee/13.2.603 Zobrazit plný text záznamu